elastos
Showing with 32 additions and 0 deletions.

+32 −0 contracts/fusion/contract/ArrayLib.sol
diff --git a/contracts/fusion/contract/ArrayLib.sol b/contracts/fusion/contract/ArrayLib.sol
@@ -0,0 +1,32 @@
+pragma solidity ^0.4.19;
+
+library ArrayLib {
+    function remove(uint256[] storage _array, uint256 _value)
+        internal
+        returns (bool success)
+    {
+        int256 index = indexOf(_array, _value);
+        if (index == -1) {
+            return false;
+        }
+        uint256 lastElement = _array[_array.length - 1];
+        _array[uint256(index)] = lastElement;
+
+        delete _array[_array.length - 1];
+        _array.length -= 1;
+        return true;
+    }
+
+    function indexOf(uint256[] _array, uint256 _value)
+        internal
+        pure
+        returns(int256 index)
+    {
+        for (uint256 i = 0; i < _array.length; i++) {
+            if (_array[i] == _value) {
+                return int256(i);
+            }
+        }
+        return -1;
+    }
+}